JPH0584482A - Device for sucking floating material on liquid surface - Google Patents

Abstract

PURPOSE:To efficiently and uniformly suck floating material over the whole liq. surface of a liq. storage tank by surely holding the suction port of a suction pipe on the liq. surface. CONSTITUTION:The suction port 3 of a suction pipe 2 is surely held on a liq. surface by a lift 6 in accordance with the liq. level detected by a level gage 14, a tracker 15 is furnished to horizontally move the lift 6 holding the suction port 3 in a liq. storage tank 1, and the floating material on the liq. surface is uniformly sucked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for sucking suspended matter on the liquid surface, which sucks suspended matter such as oils and paint debris floating on the liquid surface of a waste liquid storage tank or the like with a suction pipe.

[0002]

2. Description of the Related Art A conventional suction device is provided with a suction port for sucking suspended matter on the liquid surface at the tip of a suction pipe extending from the liquid in a liquid storage tank toward the liquid surface. In order to efficiently suck only suspended matter without sucking air or liquid as much as possible, it is common to hold the liquid at the liquid surface position by a float that follows the level change of the liquid surface (Japanese Patent Publication No. 47- No. 13215, Jitsuko Sho-56-200
74, U.S.A. 57-9381, JP-A-63-162.
093).

[0003]

However, a float floating on the liquid surface is easily shaken under the influence of wind waves, and especially when a strong wind such as a typhoon causes a large swell on the liquid surface.
Because it tilts greatly to the left and right and repeats abrupt vertical fluctuations, the suction port protrudes so that it completely separates from the liquid surface position, and suspended matter on the liquid surface is not sucked in from the suction port, and only a large amount of air is drawn. May be inhaled. Then, when a large amount of air is sucked from the suction port, the inside of the suction pipe extending from the liquid toward the liquid surface is completely hollowed,
The whole suction pipe receives a large buoyancy force and floats on the liquid surface, which may cause the float to fall and the suction port may not be able to return to the original state while protruding above the liquid surface. In addition, to prevent the suction port from protruding above the liquid surface,
Although a weight has been devised, if the weight is attached, the buoyancy of the float decreases, and the vertical movement of the float may cause the suction port to completely sink into the liquid and suck a large amount of the liquid.

Further, since the suction device which merely holds the suction port of the suction pipe at the liquid level position with the float cannot suck the suspended matter uniformly over the entire liquid level of the liquid storage tank.
In the stagnation of the storage tank that collects the waste paint, the paint components in the waste paint gradually agglomerate and coarsen to grow into a sticky mass called a sludge ball, which clogs the suction port of the suction pipe and floats. It sometimes caused the damage of being unable to suck. Therefore, the present invention, without being affected by wind waves, ensures that the suction port provided at the tip of the suction pipe is reliably held at the liquid surface position of the liquid storage tank and that the suspended matter can always be efficiently sucked, The technical issue is to be able to absorb the suspended matter evenly over the entire liquid surface of the liquid storage tank.

[0005]

In order to solve this problem, the present invention relates to a suction port for sucking suspended matter on the liquid surface at the tip of a suction pipe extending from the liquid in the liquid storage tank toward the liquid surface. In the device for sucking suspended matter above the liquid surface, a lifting drive device for raising and lowering the suction port to hold it at the liquid level position, and a level meter provided integrally with the suction port so as to be vertically movable,
A controller that outputs a position adjustment signal for moving the suction port up and down according to the level change of the liquid level detected by the level meter to the elevator drive device, and the elevator drive device based on a tracking signal output by the controller. And a tracking device for horizontally moving the liquid in the liquid storage tank.

[0006]

According to the present invention, when the liquid level changes,
A level meter that can move up and down integrally with the suction port that sucks suspended matter on the liquid level detects the level change of the liquid level,
The control device outputs a position adjustment signal for moving the suction port up and down according to the level change to the lifting drive device. This allows
Since the suction port is moved up and down by the lifting drive and held at the liquid level position, like the conventional example that detects the level change of the liquid level with the float floated on the liquid level and follows the change, There is no possibility that the suction port will be separated from the liquid surface due to the influence, and the suction port can be reliably held at the liquid surface position.

Further, since the lifting drive device for holding the suction port at the liquid surface position can be moved horizontally in the liquid storage tank by the tracking device, floating matters floating on the liquid surface of the liquid storage tank can be prevented. It can absorb evenly and reliably. Therefore, it is possible to prevent the clogging of the suction pipe and the suction port thereof by reliably preventing the generation of a mass of an adhesive substance such as a sludge ball in the stagnation of the liquid storage tank.

[0008]

Embodiments of the present invention will be specifically described below with reference to the drawings. 1 is a front view showing an example of the suction device according to the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a plan view thereof.

In the suction apparatus of this example, a suction port 3 for sucking suspended matter on the liquid surface is provided at the tip of a suction pipe 2 extending from the liquid in the liquid storage tank 1 toward the liquid surface. The suction port 3 is opened in the circumferential direction along the liquid surface, and the upper surface of the opening 4 forms a guide slope 5 that extends conically toward the tip of the suction pipe 2. The opening 4 has an opening height of about 200 mm.

In the figure, reference numeral 6 denotes an elevating / lowering device for vertically moving the suction port 3 and holding it at the liquid surface position. The suction port is connected to a rod head 9 of a piston rod 8 which vertically expands and contracts by a connecting rod 10. 3, an air cylinder 7 supporting the air cylinder 3, and a hoist 12 suspending and supporting the air cylinder 7 with a chain 11.
It consists of and. Further, the air cylinder 7 is provided with a horizontal member 13 extending parallel to the liquid surface, and a sonic level meter 14 for detecting a level change of the liquid surface is provided at the tip of the horizontal member 13.

Next, reference numeral 15 designates the lifting drive device 6 for the liquid storage tank 1.
A tracking device that moves horizontally within
A self-propelled mount 17 that travels in the front-rear direction of the liquid storage tank 1 on tracking rails 16 and 16 laid along the upper ends of the left and right side walls 1a and 1b of the liquid storage tank 1, and the liquid storage tank 1
Of the self-propelled pedestal 17 which is installed in a direction orthogonal to the tracking rails 16 and 16 straddling the upper part of the above, and a traveling carriage 19 which travels in the left-right direction of the liquid storage tank 1 on the tracking rails 18 and 18. And the traveling carriage 1
A hoist 12 of the lifting drive device 6 is fixedly mounted on the lifter 9, and a suction pump 21 that connects the flexible hose 20 connected to the rear end of the suction pipe 2 to the suction side is mounted on the hoist 12. A flexible hose 23 is connected to the discharge side of the suction pump 21 for discharging the suspended matter sucked from the suction port 3 of the suction pipe 2 into the separation tank 22. Further, the self-propelled pedestal 17 is provided with a motor 25 for driving the traveling wheels 24 of the chain spcket mechanism to rotate in the forward and reverse directions. A motor 27 that operates is provided.

Next, 28 is a control device for outputting to the hoist 12 a position adjustment signal CH for moving the suction port 3 up and down according to the level change of the liquid level detected by the sound wave level meter 14. Further, the control device 24 controls the suction port 3 for the air cylinder 7 based on the level detection value of the level meter 14.
Control signal C that raises and lowers in small steps with an amplitude of about 20 mm
S is continuously output in a cycle of several seconds and the motor 2
5 and 27, the self-propelled mount 1 of the tracking device 15
7 and tracking signals CA and CB for driving the traveling carriage 19 are output at fixed time intervals.

However, when the level of the liquid surface changes due to the inflow or outflow of the waste liquid, the level change is detected by the sound wave level meter 14, and the hoist 12 is output from the controller 28.
A position adjustment signal CH corresponding to a level change is output to the hoist 12 based on the signal CH.
1 is rolled up or unwound by a required length to hold the suction port 3 at the liquid surface position. Therefore, the suction port 3 does not separate from the liquid surface due to the influence of the wind wave, and the level meter 14
Since the liquid level is reliably held at the liquid level position following the level change of the liquid level detected in step 1, there is no possibility of inhaling only air or liquid as in the conventional case.

If an opening 4 is formed in the circumferential direction of the suction port 3 and the upper surface of the opening 4 is formed as a conical guide slope 5 as in the embodiment, the suction pipe from the suction port 3 is formed. Two
The liquid sucked into the vortex produces a vortex and the suspended matter on the liquid surface is sucked up by the vortex so that the efficiency of sucking the suspended matter is significantly improved. Further, the control device 28 outputs a control signal CS to the air cylinder 7, and the piston rod 8 of the air cylinder 7 is expanded and contracted with a stroke of about 20 mm to hold the suction port 3 held at the liquid surface position in small increments. When it is moved, the efficiency of absorbing the suspended matter on the liquid surface is further improved, and at the same time, even when the liquid surface is wavy, only the air is not sucked from the suction port 3 and the air is mixed into the liquid like bubbles. The suction pipe 2
There is no possibility that the suction pipe 2 floats above the liquid surface due to the air being filled in the pipe.

The control device 28 outputs tracking signals CA and CB for causing the self-propelled pedestal 17 and the traveling carriage 19 of the tracking device 15 to travel at fixed time intervals, respectively, and the suction port of the suction pipe 2 is discharged. Since the elevating drive device 6 for holding 3 at the liquid surface position can be moved vertically and horizontally in the liquid storage tank 1, it is possible to reliably and uniformly absorb the floating substances floating on the liquid surface of the liquid storage tank 1. Therefore, it is possible to prevent the clogging of the suction pipe 2 and the suction port 3 of the suction pipe 2 by preventing the generation of a mass of an adhesive substance such as a sludge ball in the stagnation of the liquid storage tank 1. If a plurality of suction ports 3 of the suction pipe 2 and a lifting drive device 6 that holds the suction ports 3 are installed along the longitudinal direction of the self-propelled mount 17 at predetermined intervals, the traveling carriage 19 is not provided. Also, the suspended matter in the liquid storage tank 1 can be absorbed evenly.

[0016]

As described above, according to the present invention, the suction port provided at the tip of the suction pipe extending from the liquid in the liquid storage tank toward the liquid surface is located at the liquid surface position without being affected by wind waves. Since it is securely held in the liquid surface, the efficiency of absorbing suspended matter on the liquid surface is increased, and at the same time, there is no possibility that only the air will be sucked into the suction pipe and the suction pipe will float above the liquid surface. By moving the lifting drive device held in the horizontal direction in the liquid storage tank, it is possible to absorb the floating substances floating on the liquid surface of the liquid storage tank evenly and reliably, so that the sludge ball can be used in the stagnation of the liquid storage tank. There is a very excellent effect that it is possible to reliably prevent clogging of the suction pipe and its suction port by preventing the generation of a sticky substance such as.

[Brief description of drawings]

FIG. 1 is a front view showing an example of a suction device according to the present invention.

FIG. 2 is a side view of the suction device.

FIG. 3 is a plan view of the suction device.

[Explanation of Codes] 1 ... Reservoir CH ... Position adjustment signal 2 ... Suction tube CA ... Tracking signal 3 ... Suction port CB ... Tracking signal 6 ... Lift drive device 14 ... Level meter 15 ... Tracking device 28 ... Control device

Claims (1)

[Claims] 1. A liquid surface provided with a suction port (3) for sucking suspended matter on the liquid surface at the tip of a suction pipe (2) extending from the liquid in the liquid storage tank (1) toward the liquid surface. In a floating substance suction device, a lifting drive device (6) for raising and lowering the suction port (3) to hold it at the liquid surface position, and a level meter provided so as to be vertically movable integrally with the suction port (3). (14) and a control device for outputting a position adjustment signal (CH) for moving the suction port (3) up and down according to the level change of the liquid level detected by the level meter (14) to the lifting drive device (6). (28) and a tracking device (15) for horizontally moving the lifting drive device (6) in the liquid storage tank (1) based on the tracking signals (CA, CB) output from the control device (28). A device for sucking suspended matter on the liquid surface, which comprises: